Protection envelope for 120V rails
The SMBJ120A-13-F: Its 133V minimum breakdown voltage means it stays out of the way during normal operation, and the 193V maximum clamping at 3.1A peak pulse current (10/1000µs waveform) limits the voltage seen by downstream components during a surge event.
Package and assembly fit
The SMB footprint is widely used and shares land pattern compatibility with many SMCJ and P6KE series parts, easing BOM consolidation.
